Submerged double acting pump



v Aug. 10, 1943. IQIOCQNNQHlE 2,326,378

SUBMERGED DOUBLE ACTING PUMP Filed Jan. 8, 1940 2 Sheets-Sheet 2 3 v 23a2 s\ so 56 25 5a 5'! 34 ss s by 4' 6| 53 v v v W 4 iztzizststsihiINVENTOR TORNEY terference,

Referring more particularly to the. drawings,

where the-double acting pump I (Figure l)'is to be used in aconventional driven well; a suitable pipe or well casing 2 will be used.Under these conditions, the-pumpcylindert will be of an outsideidiameter suificientlysmaller than the inside diametei pf thegvell'casing2 to permiteasy installation' tof' same therein,- as well" as to provide7 a passageway 4 therebetween which will permit 'flow offluid 'totheupper end of the cylinders.

. thing which would interfere with the free oper and into the interiorof same through upper inlet ports-5. The double"acting"pump'l','however,'

large pieces of gravel or rock therethrougn, a"

thesefprojections being :adapted to threadedly.

ation of inlet valve l8.'

Instead of using a threaded disc IS, the lower .end of cylinder 3 may beprovided with a connector' member 22 (Figure 11) having externallythreaded end projections 23 and 724, the first of engage the lowerinnerend of cylinder 3, while threaded projection 24 is adapted to receivethe end of a coupling sleeve 25,whi'ch in turn is "adapted to engage theupperend of a convenis 'notlimi'ted to 'use inside ofla wellcasing 2, .z

sinc obviously it is.adapted'forfsubmerged use! in a conventional ,dugwell, cistern, or, body of fluid to be pumped; 3 h

.The double acting pump I (Figure-1) includes a pump cylinder 3 withupper inlet ports'fi. -A pis'- ten 6 suitably mounted on a hollow"plunger rod. (I is adapted for reciprocating endwise movement withincylinder.3 under-theiniiuence;of endwise movement 'of;;pistonrod itvsuitably cqnne'cted to plun e: r sczf i talmemeen's 1 c threadedconnecto rg member 9, .Outlet means for fluid fl win h ou ho ew r n er"millpr vi d,- nd n 'conr n io al' f rim. f'i s nsists of 1 outlet islits I mar -passageways H3 {adjacent inder 3at1the' ends there f' -ispreferably }threaded plates: I; d512, which are; cqrrespondinglythreaded onftheir-gperiphery, g -inay be screwed l thereinto a: suitabledistance, which in preferred I construction will correspond; with theend of the threads .on-the inner circumference pi the; cyl-- V this man.ner presents the advantage of allowin I the upper 1 and lowerjpartitionplates to-be frictionallyheld in -desired pc-sitiondue to binding actiongi'the threads .when- 'the=partition plates reach a posi-v tioncorresponding with the: endoi-jthe, threads in the cylinder. -;-Thisprov ides a simplifiedpositive f I construction which is highlyadvantageous from 7 1;the;.ma nuf acture, ,-'assembly; and ma' it .1standpoint; r l I, 1 I The upper partition plate :I l in its finalassembly position will preferably be slightly below "..upper; n t' prts} to aQi iefiafi w q zfl the ch mbe l ab p e partit n p a e- I for'relatively free flow under operting conditions. throu g DO p -,:-Fi l&31 nto the-up 9?- tion of the pumping chamber I 5 of the cylinder 3,

as will be hereinafter described. Constrnction in i t thifsm'anner alsopresentsi the advantage of-pro 1 tecting the} inlet valve assembly .fromergternal V --r,interfe e ce. ,1

. 1' .=The:.= 1ower par it o g at p operating position will besufficiently spaced from the lower end of cylinder 3 to provide achamber 1 I 6 in which ste'm l] of spring-held .loweninlet inder -3.:Threading the cyl nder g f ninjas peered va ve. l8 m t eel i op r te o"9 xtermlin- Fw l 1 1193. the pump,

the end of cylinder ;3 upon .rotation into. final tenance tional .w'ell.point 26 which is constructed with screen section 6! to separate graveland sand from water onother fluid being drawn therethrough.; A centralpassageway 21' (Figure 9) through connector. member 2 2' acts toconnect.

chamber IS in the end of pump cylinder 3 with the'interior of well point25.

' "A similar connector member 2215 preferably usedat the upper endoicylinder-(Figure ,1)

' forjoining same' t of the lowerendeof production tube; 28 which isadapted-to carry the j fluid being pumped to the surface or deliveryspout (not -'shown)-.' Where the connector member 22 is fused at t heupper end of the cylinder 3, its passageway Z'Lwill be centrally locatedand of a'size closely fitting. but permitting freeendwise move- Iment ofhollow plunger rod'l therethroughh To 7 prevent leakage throughpassageway 21, packing grooves-29 may be provided and suitable packing30, such as a leather ring, used therein. V A modified'construction fortheconnector member 2 2 is shown in;-Figure-10. This connector member 22is counterbored at its upper end and threaded to receivela packing gland3|; adapted to compress packing 3ila in accordance with standard packinggland practice.

v The upper partition plate II (Figures 1, 3, and .8) is provided with acentral passageway '32' Y which is preferably centrallylocated and of asize closely fitting but permittinghfree endWiSe movement of hollow.plunger therethrough, The

pas sagewayfiiz in preferred construction is o fl leathenor the like asa iurther aidinproa fluid-tight joint with hollow plunger ;;Inlet'por tsI3 through partition plate ll are ovifdedLand these ports are normallyclosed by: an (annular valve gplate '33 carrying upwardly projectingstems.3fl=whic h, pass through and slid ably fitsuitab le openings 35inpartition plate I I between port s l3. 7 Compressionsprings 35 areconventionally mounted on stems'34 and held in operable position as bymeans :of washers 31 and permit inflow offluid "through ports [3 undersuction conditions produced by downwardfmovementof piston 6. The spring58 used inconneca n e-tjo'the opening of the valve under cgii as J jofiflow offluid into the pumping chamber I The USB'Of mild tension springsat these points tion with lower inlet valve i8 is likewise preferably ofmild te nsion sufiicient to cause; positiveoperation of the valvewithvery moderat re Y {presents theadvantage of'reducing the force to beexertedfin operatingthe pump with corre spending increase" invefiiciency. of power input pertunit ofxfiuid pumped.

position. To permit flow -of.-fiuid through:disc

9, his; provided with 'periorations 2 l (Figure- 5) sufiicienty small insize to preventpassage of;

I onepreferred construction, the lower end of the hollowiplunger rod 'i'is machined to areduoed uniform diameter'ffor a short} distance togrooved andlprovided with suitable packing 62 I fromthelatteri- 1 A a2., In a double acting pump, the combination. which includes a cylinderwhich, is internally v threaded a hort distance at both ends, externally,7 y

Other modes of applying tlieprinciple of my invention maybe employedinstead of those explained, change being made asregard themechani'sm'herein disclosed,'provided the means stated by any of thefollowing claims or the equivalent of such stated means-be employed. 1

r I therefore particularly pointout and distinctly claim as myinvention: a i r t 1; ma pump,the' combination which includes acylinderinternally threaded a short distance at'both ends, externallythreaded-upper and lower partition plates; one-ateachend of saidcylinder andthreadedly engaging same substantially at the inner end ofthe threads thereof, inlet valve a means for said cylinder, said valvemeansbeing separatelyfmounted on' both -of-said partition of said"piston and then the vother in accordance with'outlet'requirementsl 3.In a.dQubleactingpumpj the combination 7 which: includes a cylinder.which IiS internally threaded a short distance at both ends, externallythreadedmeans; one ateach end oisai'd cylinder and'adapted to engagesaid'internal threads of said cylinder, a piston, 'a plunger rod, saidexternallythreaded' means at the upper endofsa'id cylinder having v asuitable central passageway through which said plunger rod isadaptedeto' 'slidably "pass and. closely fit, said externally i threadedmeans at the upper end of said'cylin'der also having inletopenings'therethrough, an annular valve means within'said cylinder andadapted. to cooperatewith said inlet openings to control the fluidflow'therethrough in accordance with plates, a connector memberior'the'upperendcf said cylinder; said upper partition platebeing-substantially spaced from the connector member to provide acompartment therebetween, saidcylin- 1 'der having at least onepassageway through the {side thereof into, said compartment between theconnector member and upper partition plate. a

plunger rod passing through said-connector memher and upper partitionplate and forming arelativly; fluid tight sliding fit therewith, apiston K nounted on said "plunger rod for reciprocation.

withinisaidcylinder-"in the space between said inlet" valvecarrying rpartition plate assemblies, V and an outlet means; from said cylinder,said outlet means including a longitudinal passage- .wayin-said plungerrod with discharge outlet therefrom outside of said cylinder, .and avalve means-at said piston connecting said. passage- 7 way first at oneside of said piston ;and then the otherjto said cylinderwior flowfofpumped fluid;

threaded upperand lower partition plates, one

:at; ieach 'e d. of 1 said cylinder and 'threadedlygem gaginsamesubstantially at the inner endoi tion plates, azconnector member forthe upper i said valve means being separately i,

, passageway through said plunger: rod first orrone pumpingrequirements, said externally threaded V meansat the lower endof saidcylinder having 20' at least one inlet passageway therethrough, avalvermeans within said cylinder and adapted to cooperate with the inletportion of said last named externally threaded means to'control thefluid fiow therethrough in accordance with pumping requirements, xsaidexternally threadedfmeans at both ends'of said cylinderextendingthereint/o. asufiicient distance to .form v an '1 inletacompartment ateach end of said cylinder and-from which fluid can flow" through'saidinlet passageways as required for-pumping purposes, eachlofsaid-compartments, having at least one suitable winletr for-flow offluid thereinto ,andthence through. said respectivevalve-;controlledinlets through said externally threaded .rneans, external meansforprotecting said lower inlet valve,

means on the end of said plunger rod within'said cylinder-for mountingsaid piston for limited endwise movement thereon, said .piston.cooperating with themeans onI-the end of said plunger rod so as to actboth asfa piston and an outlet "valve,

and-anv outlet means:forsaidipylinder; said out let means including 3;alongitudinal: passageway through {said plunger'rrod 'with dischargeoutlet therefrom outside-"of -said cylinder, :said piston connectingthe; interior of-saidcylinder with the side of said piston and-then theotherin'accordiance'with the reciprocation ofthe plunger rod;

4. In a doubleecting 7 pump, a cylinder; an

inlet means ateach end of said cylinder-,::each

ofsaid inlet means including a perforated partiend of said cylinder,"said upper partition plate being substantiallyispaced from t heconnector member to provide an-inlet compartment therebetween, saidcylinder having at least one passagewaythroughth side-thereof into saidinlet compartment between saidconnector member and said; upper partitionplate, a plunger 'rod passin through saidconnector member and'saidupperpartition plate and having a relatively fluid tight plunger rod forreciprocation within said cylinder inthe space between said inlet valvecarrying partition plate assemblies, and 3111011171612 means for saidcylinder;saidioutletmeans including a longitudinal passagewayiin saidplungerrod'with discharge outlet'therefrom outside of said cylinder,saidpiston being mounted on the end of cooperate with said-piston toprovide outlet valve action in manner connecting said cylinder in? Yterior to saidioutlet passageway first onaone side :tion m'embe'r withqavalve seat,=a valve for each 0f said-valve seats;-:a piston slidablymounted within said cylinder,-y-said-pistoncomprising a ,bodyrnemberhaving-a hub":portion with a uniformcross-section longitudinal centralpassageway therethrougnfmeans'mounted on said body member forfrictionally contacting theiinner cirsliding-fit with both,,a-pistonmounted on said a member, and means for gripping said cupleathers cumference of the cylinderiwall and forming a sealedjointtherewith underpumpingfaction, said meanscomprising a pair of suitablesize-cup leathers; a'radialflange extending from said bfody against saidflange,, a hollow plunger maths end ots'aid plunger rod; withinsaidcylindergfor a' portionof the piston body member; and a pair ofspaced-apart stopmembers onthe inner end of said plunger rod, eachextending completely around same; said hollow plunger rod'bein'gprovidedj with a plurality "oflongitudinal, slits 'between saidstop member's,= said longitudinal slits terminating at each end: justshort of reaching, 'saidi stop membersto lfacilitateleakage-desistaces-ave 1 V 1 -ance; said pistonf body", memb slidiablytmountedsior;limiteditravel onrsai'dhollow plunger;

rod between saidstop. members in:mannen suchr that; when the body memberis in contacttiwithz either stop member; a1substantialportionaofisaid;

slits will. beexposed at,.,.thet nontecdntacting end:

" edid-perforated meanssoiastogiorntazsmal qcmf l werznarti on p tezii'allygiat th peer;

ofithe bodymemb'er, the:endstofvsaidzbodyimemer I V hen-and the:corriespondin'g;stop:members nayingt cooperating faces if orforming a:sealed joint when; in contact; with eachiiother; wherebyntuiderr um s;ing actionsaide piston acts? not: only-:as-zar; piston"; but a valve aswelliandlhencec facilitates high hc V efiicient-pumpingactiom. 1 V. V 5;A pumping apparatusfcomprisingiaipfoduc tion-= tube, apump; cylinder, a2connector: member;

for j oiningthetlowerend of said? productionjtnbei to theiupperr endofsaid, cylinder, anzupp tpa'rtir "tion platewithin: said-cylinderandspaQed; irorn: said connector membertoform-,a compartnrent; means forfastening said par-tition plateiryfixed position; said cylinder havi'ngopening-s throughthe sides thereof; into said-,compartment-,- inletvalve;means,;sa id inletvalvemeansrincludingr an: inlet valve mounted onsaid upper partition plate 3 for permitting'fiuid fiow from saidcompartment to the portion of the cylinder below said partition plate,means for closings'aid inlet valve at the end of flow of fluid from saidcompartment 'into said cylinder, a-valve seat for'said valve, aperforated inlet means at the lower end of said 0 cylinder, a lowerpartition plate within said cylinder and spaced from saidperforatedmeans so as to form a compartment therebetween, means for fastening saidpartition plate in fixed position, an inlet valve means, said inletvalve'means i includingan inlet valvemounted on said lower partitionplate for permitting flow of fluid from said compartment into the spacewithin said cylinder above said partition plate, means for closing saidinlet valve at the-end offlow of fluid from said compartment into saidcylinder, a valve seat for said valve, a hollow plunger rod passingthrough said connector member andzupper partition plate, saidplunger rodhaving areatively tight, but free sliding fit therewith, said plungerrod also having an inlet at its endwithin the cylinder and an outletwithin the producing slidably'mounted on said hollow plunge v rodbetween said stop members in manner such that tion tube, and a valvedpiston on the end of said 1 hollow plunger rod within said cylinder andadapted to cooperate with the inlet on the endf i of said hollow plungerrod for flow of'fiuid therethrough for pumping action underreciprocating movement of said valved piston endwise of said' cylinderand on said hollow plunger rod; v

6. In a double acting pump adapted for sub-.

merged use while connected to a production tube, the combination of apump cylinder internally 'end'oflthertlrreads infithe 1, r endpfrs V inmit rtssthrw h said loweriparititicneplatet a nletrw ive fon said nonseci c meansare normal y-holding saidinlet M ilman-classed; cs e;-

' tion," annpw ipiunee rod: nassinggthrcu n s I- upper partitio'mplatslid grfit h iwi hi see-1p V ingan; outlet-{lat endr-w thin th'einduction} tubeigap st nslida rm unted:w iupz-sa dzcvlin de s idmisto rcom ri ng-a cyl nder Wal -enga e ins: re ion with; ae odv'mem enhar neraub nl n eeli ek i h adapted-to closely ,7

H w r t rc a z ehi b p iiq V mber; a 1 ,ef-peee dr e therebetween; sat

I V andsiciner; members said, pl n r-L rod: havin a1-re1ativ mti h s butre r nneeltrodaals rhaver pqrt cn withra unifomaic $rS QtiOD l0 gi nt -pewa t ffii n'oua ith endz yli ld rsbeins ba s- 1*; a drelri eeer eeaehze e yaerou d isaidelic ingprovidedw pluralit Ql'lglglldiilfill; twen-p d QPTIE PQPQ Ii a z ldil i milld 51, 1 terminating at each endjustshort of reaching said stop members, said piston body member bewhen thebody member is in-contact with either stopv member a substantial portionof said slits" I will be exposed at the non-contacting end ofthe body,member, the ends of said body member and the corresponding stop membershaving cooperat 7 ing faces for forming a sealed joint when in con 5tact with each other.

7. A device of the classldescribed,comprising a pump cylinder, partitionmembers within said cylinder and'spaced a short distance'.from theends'of same, means for anchoring said partition members' inplace,'inlet valve means for -said; cylinder, said inlet valve meansbeing mounted ,on said partition members, a tubular plunger rod passingthrough one of said partition members, means onsaid partition memberforlp foducing a substantially fluid tight sliding fit with said plungerrod," a connector means for joining one'end of said cylinder to aproduction tube, said connector means closely fitting saidplungerrodwhile permitting same to freely slide therethrough,

' means on its periphery forming a sliding seal joiner member on thethreaded at each end, an externally'thre'aded con. i nector member forjoining the lower end of'sald with the cylinder wall, said bodymemberybein longitudinally bored and faced atits ends, a end of said.tubular plunger rod, said joiner member forming a slip-fit joint withsaid body memberso that the latter can slide endwise a limited distancethereon, and means for sealingthe ends of said body member on saidjoiner member, alternately at one end of same and then the other to forma substantiallyfiuid tight j joint in either position, said joinermember having openings in its periphery in the area over which said bodymember slides, and at least adjacent the ends of such area, wherebyunder pumping action, themovement of said body memannular'inlet valve inclosed position, a perforated means connected to the lower end of saidcylinder, an externally threaded lower partition plate within saidcylinder and spaced from her on said joiner member acts as an outletvalve with outlet of fluid from said cylinder on alternate sides of saidpiston through said tubular plungerrod. V '8. A pumping apparatuscomprising a production tube, a. pump cylinder, a connector memberfor'joining the lower end. of said production tube a piston mounted onsaid plunger rod forreciprocation within said cylinder, said pistonhaving a single sliding body member with 6 t to theupper end of saidcylinder;{said connec'tor' member having an outsidesizenot exceeding theoutside {diameter ofsaid cylinder, an inlet valve means foi saidcylinder at the upper" end thereof, means for connectingsaidfinletvalve" to the exterior of said-cylinder for flow of fluid into; saidcylinder through-said inlet 'valve under suc-' 3 tion pressure, an inletvalve at the other end of said cylinder, means-for protecting said inlet1 valve-from externalinterference, means for-cone necting said inletvalve to the exteriorof said cylinderior flow of fluidfto said cylinderthrough said inlet valve under suction pressure,'a hollow plunger rodpassing from saidproduction tube into said cylinder through said joinermember,- means for forming-a seaIed jOint between said joiner member andsaid plunger rod while per- Initting' the latterto have a 'ireeslidingfitthe re with,'*said plunger rod; having an inlet 'atits end withinthe'cylinder and an outlet at its end with in the production tube, a pistonWithin said cylin der, said piston having a body 'm'ember' longitudinally bored and faced at its ends andhaving means on its peripheryforming asliding seal with the cylinderwalhsaid sliding "seal means bodymember slides,v and .at leasti-adjacentbut gamers messing a pair.ofi-cupleathers; a supp rting member for said cup leathers,saidsupporting means comprisinga radial flange. 'extendingfmm saidpiston body member, and continuous means fotgripping said-cup leatherswiththeir backs i against "said iflange ra.joinerzmember. onethe end ofsaid-'hollow plunger rod, said joiner-member beingadapted itoislidably.fit the bore of saidpiston body member immanner permitting limitedendwis'e sliding offsaid .body' member on said -joiner,.member,saidjoin-er. member having 'openings in its peripheryin the areaoverwhichsaid j spaced from the ends of such area to check leakage,[ andshouldered means cooperating with said' joiner member for sealing withthe ends of said=bodymember atth ends of its-travel onu saidjoinermember toform a substantially fluid tight joint, whereby under pumpingaction; the movement of said piston body-member onfsaid joinermemberacts as an outlet valve for flow of fluid from said cylinder atalternate sides of saidjpistonthrough said hollow plunger rodfi LEVILiMcCONNOHiEa-

